Long guns are off-topic...
But I don't see how this really could have happened. I think it's all a hoax. The guy has been a felon since 1990, when he was 19. Since then, he's been convicted of 2 more felonies and 2 misdemeanor drug charges, so he's 5x a prohibited person. There's no way he could have possessed a firearm.
And while there are some old records missing, from the beginning of his adult criminal career, all that's showing on CCAP as far as punishment is some fines and a total of about 2 months in jail.
30 charges, 14 convictions, and that's all that's showing up as punishment.